<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul
          class="cart-list"
          v-for="(cart, index) in cartInfoList"
          :key="cart.id"
        >
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked == 1"
              @change="updateChecked(cart.skuId, $event)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">{{ cart.skuName }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice }}.00</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="handleClick('reduce', -1, cart)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              minnum="1"
              class="itxt"
              :value="cart.skuNum"
              @change="handleClick('input', $event.target.value * 1, cart)"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="handleClick('add', 1, cart)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.skuNum * cart.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a
              href="javascript:void(0)"
              class="sindelet"
              @click="deleteCartById(cart)"
              >删除</a
            >
            <br />
            <a href="javascript:void(0)" class="sindelet">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input
          class="chooseAll"
          type="checkbox"
          :checked="isAllCheck && cartInfoList.length > 0"
          @change="checkAll(cartInfoList, $event.target.checked)"
        />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="javascript:void(0)" @click="updateAll">删除选中的商品</a>
        <a href="javascript:void(0)">移到我的关注</a>
        <a href="javascript:void(0)">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>0</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalPrice }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" href="javascript:;" @click="$router.push('/trade')">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {
  reqAddOrUpdateShopCart,
  reqDeleteCartById,
  reqUpdateCheckedByid
} from '@/api'
import { mapGetters } from 'vuex'
import throttle from 'lodash/throttle'
export default {
  name: 'ShopCart',
  computed: {
    ...mapGetters('shopcart', ['cartList']),
    cartInfoList() {
      return this.cartList.cartInfoList || []
    },
    //计算购买产品的总价
    totalPrice() {
      let sum = 0
      this.cartInfoList.forEach((item) => {
        sum += item.skuNum * item.skuPrice
      })
      return sum
    },
    //判断底部复选框是否勾选【全部产品都选中，采勾选】
    isAllCheck() {
      //遍历数组里面原理，只要全部元素isChecked属性都为1===>真 true
      //只要有一个不是1======>假false
      return this.cartInfoList.every((item) => item.isChecked == 1)
    }
  },
  mounted() {
    this.getData()
  },
  methods: {
    getData() {
      this.$store.dispatch('shopcart/getCartList')
    },
    //修改某一个产品的个数[节流]
    handleClick: throttle(async function (type, disNum, cart) {
      switch (type) {
        case 'add':
          disNum = 1
          break
        case 'reduce':
          disNum = cart.skuNum > 1 ? -1 : 0
          break
        case 'input':
          disNum =
            isNaN(disNum) || disNum < 1 ? 0 : parseInt(disNum) - cart.skuNum
          break
      }
      //修改购物车某一个产品的选中状态
      let res = await reqAddOrUpdateShopCart(cart.skuId, disNum)
      // console.log(res);
      if (res.code == 200) {
        this.getData()
      } else {
        console.log(res.message)
      }
    }, 500),
    //删除某一个产品的操作
    deleteCartById(cart) {
      this.deleteCart(cart.skuId)
      this.$message.success('删除商品成功')
    },
    //修改某个产品的勾选状态
    updateChecked(id, e) {
      let checked = e.target.checked
      checked = checked ? 1 : 0
      this.updateCheck(id, checked)
    },
    // 全选设置
    async checkAll(_, e) {
      this.cartInfoList.forEach((item) => {
        if (e == true) {
          if (item.isChecked !== 1) {
            item.isChecked = 1
            let id = item.skuId
            let checked = item.isChecked
            this.updateCheck(id, checked)
          }
        } else {
          if (item.isChecked == 1) {
            item.isChecked = 0
            let id = item.skuId
            let checked = item.isChecked
            this.updateCheck(id, checked)
          }
        }
      })
    },
    // 删除全部商品
    updateAll() {
      this.cartInfoList.forEach((item) => {
        let id = item.skuId
        let checked = item.isChecked
        if (checked == 1) {
          this.deleteCart(id)
          this.$message.success('删除商品成功')
        }
      })
    },
    // 封装全选修改状态请求
    async updateCheck(id, checked) {
      let res = await reqUpdateCheckedByid(id, checked)
      if (res.code !== 200) this.$message.error(res.message)
      this.getData()
    },
    // 封装删除全部商品请求
    async deleteCart(skuId) {
      let res = await reqDeleteCartById(skuId)
      if (res.code !== 200) this.$message.error(res.message)
      this.getData()
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con4 {
          width: 10%;
        }

        .cart-list-con5 {
          width: 17%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          .sindelet {
            color: #666;
            display: block;
            font-size: 18px;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: 'Microsoft YaHei';
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
